fix: error msg change, t.helper

pkg/plugin/manager.go

@@ -29,7 +29,7 @@ type Manager struct {
 
 func validateMgrCfg(cfg *ManagerConfig) error {
 	if cfg.Root == "" {
-		return fmt.Errorf("Root path cannot be empty")
+		return fmt.Errorf("root path cannot be empty")
 	}
 	return nil
 }